What's Porosity in Welding? How Porosity Causes and What's the Top Remedies to Minimise Them !!
Porosity Porosity in welding is a defect that occurs when gas bubbles become trapped in the weld pool as it solidifies and freezes, creating cavities in the weld metal. These pores or holes can be internal or break through the surface and come in different shapes. The most common type is spherical porosity, which is rounded, but elongated holes can be called wormholes or piping. Gas bubbles trapped in the weld metal, which can weaken the weld and make it more likely to crack or corrode. Also known as wormhole welds, porosity defects occur when there is an entrapment of air or gas bubbles in the weld. The welding process often generates gases like hydrogen, carbon dioxide, and steam. A cross-section of porous weld beads often resembles a sponge with an accumulation of trapped air bubbles. The entrapped gases may be localized in a specific location or uniformly distributed in the weld. These gas bubbles can weaken the joint of the weld metal, predisposing them to fatigue an